Stress state in perforated discs

The paper investigates the stress state in perforated discs by circular holes. Circular discs are subjected to two types of loadings: diametrical compression by concentrated forces and radial compression produced by an equivalent uniformly distributed load on the contour of the discs. The discs of radius 150 mm are perforated with two, four or 96 holes, of different radii between 1 mm and 50 mm or maximum possible. The stress distribution in the discs is studied according to the value of the radii of the holes and the distance between them. The stress concentration factors and their variation for the geometrical parameters of the concentrators are determined. The finite element method was used, which allows the modeling of the structure so that it is as close as possible to the real situation of the geometry and the way of application of the load.